Finally, science is bringing me the future of my dreams. We’re talking tiny little robots that crawl through your veins fixing stuff. The future is coming, and it won’t be long now.
http://blogs.discovermagazine.com/discoblog/2009/05/26/the-tiny-robot-that-can-crawl-through-your-veins%E2%80%94and-treat-your-tumors